Conveners
1011D
- Shao-Feng Ge (TDLI-SJTU)
If dark matter is ultralight, the number density of dark matter is very high and the techniques of zero-temperature field theory are no longer valid. The dark matter number density modifies the vacuum giving it a non-negligible particle occupation number. For fermionic dark matter, this occupation number can be no larger than one. However, in the case of bosons the occupation number is...
Axions present a promising solution to the strong CP problem in the Standard Model. However, this solution relies on the existence of an almost exact global symmetry, known as Peccei-Quinn (PQ) symmetry, which is problematic because quantum gravity is believed to forbid global symmetries. High-quality axion models resolve this tension by realizing PQ symmetry as an accidental symmetry, thus...
We present a comprehensive analysis of nonstandard neutrino interactions with the dark sector in an effective field theory framework. We implement the full catalog of constraints on the parameter space of the neutrino–dark matter (DM)/mediator couplings and masses, including cosmological and astrophysical bounds coming from Big Bang Nucleosynthesis, Cosmic Microwave Background, DM and neutrino...
